Results 91 to 100 of about 2,940 (206)

Photochemical effects of Mars‐like UV irradiation on carboxylic acids in carbonaceous chondrites and expectations for abiotic background organics on Mars

Meteoritics &Planetary Science, Volume 61, Issue 10, Page 2445-2465, October 2026.
Abstract In the search for life on Mars, understanding the origin of preserved organics is critical. Expected sources include exogenous delivery, endogenous synthesis, and potentially life. Environmental processing by ultraviolet (UV) irradiation can alter these organics, obscuring hallmarks of their origin. To deconvolve these effects, we conducted an
D. K. Buckner, J. C. Aponte, A. C. Schuerger, D. I. Foustoukos, F. Seguin, M. B. Wilhelm, G. Cooper, A. J. Williams   +7 more
wiley   +1 more source

Distinct element method for static and flow mobility characteristics of lunar regolith based on particle shape characteristics

Yantu gongcheng xuebao
Since it exhibits uniquely grain shape, physical and mechanical characteristics, the lunar regolith is extremely important for utilization of in-situ resources, selection of base station location and construction in lunar exploration.
SHI Anning 1 , JIANG Mingjing 2 , WANG Siyuan 1, LIN Jiayu 1
doaj   +1 more source

Oxygen isotope thermometry and composition of aqueous fluids within the parent body of asteroid (101955) Bennu

Meteoritics &Planetary Science, Volume 61, Issue 10, Page 2567-2591, October 2026.
Abstract We report on the petrography and oxygen isotopic compositions from in situ analyses of carbonates (Ca‐carbonate, dolomite, and Fe‐rich magnesite), magnetite, and apatite in particles from asteroid Bennu. Using oxygen isotope thermometry of Ca‐carbonate, dolomite, and magnetite, we estimated crystallization temperatures and the oxygen isotopic ...
Gary R. Huss, Kazuhide Nagashima, Elena Dobrică, Alexander N. Krot, Gregory Cane, Zoe E. Wilbur, Timothy J. McCoy, Catherine M. Corrigan, Sara S. Russell, Jessica J. Barnes, Ann N. Nguyen, Harold C. Connolly Jr., Dante S. Lauretta   +12 more
wiley   +1 more source

Photometry of Lunar Swirls in Comparison to Fresh Crater Ejecta

The Planetary Science Journal
Swirls are sinuous high-reflectance lunar surface features collocated with crustal magnetic anomalies. These bright features and their geographical relationship to magnetic anomalies have been studied for decades, although their cause remains unclear ...
Mallory J. Kinczyk, Brett W. Denevi, Hiroyuki Sato, Aaron K. Boyd, Anna C. Martin, Emerson J. Speyerer, Bruce W. Hapke   +6 more
doaj   +1 more source

Modular Construction for Lunar Infrastructure Using Fibre-Reinforced Composites

Engineering Proceedings
After establishing a lunar settlement, developing resilient infrastructure becomes essential. Transporting prefabricated materials from Earth is costly and logistically challenging, making lunar regolith a promising in situ alternative.
Linda Cortés-Satizábal, Deniz Yesilyurt, Kira Heins, Thomas Gries   +3 more
doaj   +1 more source

Probing Subsurface Properties With Mission Hardware: Lessons Learned From Artificial Impacts of Mars 2020

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Hardware released during spacecraft entry can generate hypervelocity impacts that provide unique constraints on planetary subsurface properties. During NASA's Perseverance descent, two tungsten cruise ballast mass devices (CBMD) and fragments of the cruise stage formed meter‐scale craters north‐west of Jezero crater, in one of the sinuous ...
A. J. Sokołowska, I. J. Daubar, G. S. Collins, F. Calef, A. Jones   +4 more
wiley   +1 more source

Influence of weathering on unsaturated electrical conductivity of granitic regolith

Vadose Zone Journal
Geoelectrical methods have been increasingly used to characterize critical zone (CZ) subsurface structure and to monitor water dynamics within CZs. To interpret field geoelectrical measurements correctly, one needs to have a mechanistic understanding of ...
Surani Liyanage, Qifei Niu
doaj   +1 more source

Reconfiguration of Mercury's Exosphere During Strong Space Weather Events

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Mercury is exposed to various space weathering processes, which alter the surface and cause emission of atoms and molecules into the exosphere. The exosphere thus allows remote insights into the surface composition and erosion processes, with the emission of refractory elements such as Ca and Mg typically being dominated by micrometeoroid ...
P. S. Szabo, S. R. Carberry Mogan, A. R. Poppe, S. Fatemi, W. J. Sun, J. T. Zhao   +5 more
wiley   +1 more source

A Review of Soil–Drone Interaction, Anchoring, and Penetration Mechanics in Lunar and Martian Regolith for Autonomous Exploration Systems

Drones
Future planetary exploration missions are expected to employ increasingly sophisticated aerial, ground, and hybrid robotic systems that must interact directly with extraterrestrial regolith during landing, takeoff, mobility, anchoring, sampling, and ...
Emilia-Georgiana Prisăcariu, Oana Dumitrescu   +1 more
doaj   +1 more source

A 400‐Year Antarctic Ice‐Core Perchlorate Record Reveals Variability in Stratospheric Chlorine Chemistry

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Perchlorate (ClO4−) in polar ice preserves past chlorine oxidation chemistry; however, multi‐centennial Antarctic ClO4− records and the mechanisms controlling their variability remain poorly constrained. Here, we present the first 400‐year (1616−2016) ClO4− record from an Antarctic ice core, revealing two regimes separated around 1980.
Wenzhi Zhou, Su Jiang, Zhe Li, Bo Zhang, Danhe Wang, Dongqi Wang, Guitao Shi   +6 more
wiley   +1 more source